Stumped. Car wont start after HG

[ShawnsGarage]

Ok guys im stumped. I am far from a newbie to DSMs and have built a few 4g63s with no problems. Until now. I just got my 92 GS put back together after the HG blew. Car ran great before. I had the head surfaced by a well know machine shop in my area and know its straight.

The timing is perfect I have checked it 3 times. Head bolts were torqued in steps of 30 60 80. Pulled the CAS and turned it and all injectors are firing as well as all the plugs. Replaced HG, bolts, cams,valve seals(viton) plugs, wires, fuel filter and still nothing. Car has great fuel pressure. It bucks and spits while cranking but wont start.

I pulled the plugs and they were wet but when I tried to burn the fluid off it wouldn't burn. Seems to have great compression but haven't done a test yet because I don't have a compression tester untill tomorrow. My guess is water or oil is finding its way into the combustion chamber. Any thoughts help because i am stumped

 

[GooeyGus]

Might be a long shot, but is the cam sensor 180 degrees out?

 

[ShawnsGarage]

I set the motor at TDC and put the notch facing forward. Also tried it the other way. still no luck

 

[cruisintalonawd]

Try brand new plugs

 

[ShawnsGarage]

I just got brand new plugs wires and fuel filter this morning. sparks good and fuel pressure is good.

 

[TSIMonsteR]

Might sound silly, but are you positive on the firing order?

What about a coupler or clamp thats not all the way tight?

OEM HG, or MLS?

 

[92_6bolt_1290]

sounds ignition related, considering where they put the coils and whatnot, but does it kinda pop while you are cranking it because if is "pops" or acts like it wants to start then you've got the firing mixed up

 

[ShawnsGarage]

Firing order is correct. Coupler or clamp for what. Im working on my GS not the GST. And its a OEM gasket

Motor firing order is 4321 and thats how I have it. Coil is labled so I know its right.

Any explanation for the Non flammable wet plugs?

 

[92_6bolt_1290]

actually the firing order is 1,3,4,2...as with pretty much ALL 4 cylinder cars...if you have your car setup to fire 4,3,2,1 then there is your problem

 

[ShawnsGarage]

Not sure where you got that info but it is incorrect. I pretty much know these cars like the back of my hand

 

[nightgamer]

bad gas could do that along with a faulty hg or cracked head or blocktry bleading some gas out of the tank and see if it will ignite

 

[ShawnsGarage]

I bled the fuel lines yesterday after adding 5 gallons of 93 to the tank. The gauge was below E before I added the fuel. And the car has only sat for about a month. Also tried starter fluid and still nothing.

 

[nightgamer]

if you can get it to run off start fluid i would check the head for cracks and see if maby part of the hg was faulty

 

[ShawnsGarage]

Im gonna do a compression test tomorrow. And if I can find a leak down tester ill do that as well

 

[nightgamer]

Im gonna do a compression test tomorrow. And if I can find a leak down tester ill do that as well

sounds like a plan let us know how it goes hope it not a bad head

 

[92_6bolt_1290]

Not sure where you got that info but it is incorrect. I pretty much know these cars like the back of my hand

its in my heyens manual. there is pretty much NO CAR out there that doesn't have cylinder 1 at the start of the firing order, nor can cylinders 2 and 3 fire one after the other considering the crankshaft design.
and the coil for the 4g63 if you are looking at it from the driver side fender is 4,1,2,3 from left to right

 

[ShawnsGarage]

Nightgamer I hope not to cause I have dumped all my money into the head gasket job. cant afford a new head at the time.

92 6 bolt when i said 4 3 2 1 i was talking about the numbers of the cylinders 1 being closest to the t belt

either way 1 and 4 fire at the same time and 2 and 3 fire at the same time thats called wasted spark.

 

[92_6bolt_1290]

yeah, that i knew...i was talking about the actual firing order which would make us not on the same page...

 

[ShawnsGarage]

I thought you were trying to tell me I had my wires wrong. Sorry for the mis-understanding but the info you are giving isnt any help here.

 

[cruisintalonawd]

If you need a head I can ship you a bare one if you pay for shipping LMK. I'm sure it something simple, How did you check the spark?

 

[92_6bolt_1290]

i see that now...and to throw in some useful info here for once, the OEM head gasket is made to crush better so there is almost no chance of leaks anywhere that the head gasket seals so whatever you have preventing you from starting isn't coming from that area at all

 

[cruisintalonawd]

where did you spray the starting fluid?

 

[ShawnsGarage]

Crusin I will PM you about the head in the morning. I checked the spark 2 diff ways. First time I was by myself and did it by turning the CAS with the plugs on valve cover. Had good spark. Then when I had help I took the plugs out and put them on the valve cover while someone turned the car over. Both times all was good

where did you spray the starting fluid?

Tried starter fluid in the intake and in the cylinders. Both time it was a No go

 

[TSIMonsteR]

I was specifically referring to a couple or clamp on the intercooler piping being busted, loose, or discounted compounding your problems. Its gotta be something simple.

I mean, if you're getting fuel, and spark.... and you think compression is the issue, you either royally screwed up the HG install, or the timing (bent valves?). Both of which are unlikely if you triple checked everything as stated.

 

[talontd92tsi]

If you are definitely getting spark, and definitely getting fuel pressure, I would suspect something around the fuel injectors, maybe the wires are broken and you didn't see it, or the plugs are busted, something of that nature.

When i had this problem I accidentally put the 2 and 3 plug wires on in the wrong spot, did the exact same thing you are describing here. I would double/triple/quadruple check that too. My car would crank and crank, then a pop, would try to start, and the BANG a big backfire out the downpipe.

Way out there....ECU?